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Prompt installation of setuptools or packaging if neither found #3944

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Prompt installation of setuptools or packaging if neither found #3944

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18 changes: 12 additions & 6 deletions scripts/firedrake-install
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Original file line number Diff line number Diff line change
Expand Up @@ -16,10 +16,21 @@ from glob import iglob
from itertools import chain
import re
import importlib


class InstallError(Exception):
# Exception for generic install problems.
pass


try:
from pkg_resources.extern.packaging.version import Version, InvalidVersion
except ModuleNotFoundError:
from packaging.version import Version, InvalidVersion
try:
from packaging.version import Version, InvalidVersion
except ModuleNotFoundError:
raise InstallError("Neither setuptools or packaging found. Please "
"install one of these packages before trying again.")

osname = platform.uname().system
arch = platform.uname().machine
Expand Down Expand Up @@ -52,11 +63,6 @@ firedrake_apps = {
}


class InstallError(Exception):
# Exception for generic install problems.
pass


class FiredrakeConfiguration(dict):
"""A dictionary extended to facilitate the storage of Firedrake
configuration information."""
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